کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5520781 | 1401227 | 2017 | 11 صفحه PDF | دانلود رایگان |
This study investigated the effect of salicylic acid (SA) and sodium nitroprusside (SNP; NO donor) on nickel (Ni) toxicity in germinating finger millet seedlings. Fourteen-day-old finger millet plants were subjected to 0.5 mmol Lâ 1 Ni overload and treated with 0.2 mmol Lâ 1 salicylic acid and 0.2 mmol Lâ 1 sodium nitroprusside to lessen the toxic effect of Ni. The Ni overload led to high accumulation in the roots of growing plants compared to shoots, causing oxidative stress. It further reduced root and shoot length, dry mass, total chlorophyll, and mineral content. Exogenous addition of either 0.2 mmol Lâ 1 SA or 0.2 mmol Lâ 1 SNP reduced the toxic effect of Ni, and supplementation with both SA and SNP significantly reduced the toxic effect of Ni and increased root and shoot length, chlorophyll content, dry mass, and mineral concentration in Ni-treated plants. The results show that oxidative stress can be triggered in finger millet plants by Ni stress by induction of lipoxygenase activity, increase in levels of proline, O2
- â radical, MDA, and H2O2, and reduction in the activity of antioxidant enzymes such as CAT, SOD, and APX in shoots and roots. Exogenous application of SA or SNP, specifically the combination of SAÂ +Â SNP, protects finger millet plants from oxidative stress observed under Ni treatment.
Journal: The Crop Journal - Volume 5, Issue 3, June 2017, Pages 240-250